Sewing machines adapted for cord laying



Feb. 25, 1958 F. w. BREUL EI'AL snwmc MACHINESADAPTED FOR coma LAYING 2Sheets-Sheet 1 Filed June 1, 1954.

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Feb. 25, 1958 F. W. BREUL ETAL SEWING MACHINES ADAPTED FOR CORD LAYINGFild June 1,1954

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WITNESS 2 Sheets-Sheet 2 ,JNVENTORS Fredric W B reu y Stanley M. .SlrvaATTORNEY SEWING MACHINES ADAPTED FOR coRD LAYING Fredric W; Breul andtanley M. Sliva, Bridgeport, Conm,

assignors to The Singer Manufacturing Company, Elizabeth, N. 3., acorporation of New Jersey Application June 1, 1954, Serial No. 433,543

Claims. (Cl. 112-100) This invention relates to sewing machines and,more particularly, to a sewing machine of the type which is adapted tomanipulate one or more ornamental cords into a position on a work fabricin which the cords will be secured to the fabric by the stitches beingformed therein.

It is an object of this invention to provide an efiicient and practicalcord-laying mechanism for a sewing machine.

It is a further object to provide a cord-laying mechanism which isadapted to be built into a sewing machine in an inconspicuous andcompact manner.

Still another object of this invention is the provision of a novel andexpeditious method for converting an existing type of sewing machineinto a highly satisfactory cord-laying sewing machine.

It is also an object of this invention to provide simple and effectivemechanism whereby our novel method for conversion of a sewing machine tocord laying may be readily and effectively practiced.

Another object of this invention is to provide a cordlaying device whichwill be shifted out of operative position automatically whenever thework fabric is to be removed or replaced in the sewing position beneaththe needle.

With the above and other objects and advantages in view as willhereinafter appear, this invention comprises the devices, combinations,arrangements of parts, and methods hereinafter described and illustratedin the accompanying drawings of a preferred embodiment in which: I

Fig. 1 represents a front view of a portion of a sewing machine with thesewing machine head taken in vertical cross-section and having myinvention applied thereto,

Fig. 2 is a detached front elevational view of the oscillatorythread-laying frame and showing a portion of the sewing machine head,

Fig. 3 is an end elevational view of the sewing machine ofFig. 1 withthe machine head face-plate removed.

Fig. 4 is a rear elevational view of a portion of the oscillatorythread-laying frame with parts of the presser mechanism and of the meansfor supporting and confining the thread-laying frame in place beingshown in a cross-section taken substantially along line 4-4 of Fig. 3,

Fig. 5 is a cross-sectional view taken substantially along line 5-5 ofFig. 1, and including only a portion of the sewing machine head, 1

Fig. 6 is a cross-sectional view of the thread-laying device and of thesewing machine presser-foot as taken substantially along line 6-6 ofFig. 1,

Fig. 7 is a cross-sectional view of a portion of the thread-layingmechanism taken substantially along line 7-7 of Fig. 2, and

Fig. 8 is an enlarged plan view of the seam which is produced by themachine of this invention.

Referring more partic larly to Figs. 1 and 3, the preferred embodimentof this invention is illustrated as apfa Ice 2,824,531

plied to a sewing machine having a conventional frame including a bed10, a standard 11 rising from the bed, and a sewing head 12 extendingfrom the standard and normally closed by a face plate 13. Journaledvertically in the sewing head 12 is a presser-bar 14 which is springbiased downwardly and which carries at its lower extremity apresser-foot 15. Beneath the presser-foot, the bed 10 is fitted with athroat plate 16 which is apertured to accommodate a work-engagingfeed-dog 17 of a conventional four-motion work-feeding mechanism. Thepresser-bar 14 is provided with a rearwardly projecting lug 18 whichoverhangs a presser-lifting lever 19 that is pivoted in the sewing head.

Fixed in the sewing head 12 by means of set screws 20 and 21 are a pairof vertically spaced pins 22 and 23 upon which a needle-bar carryingbracket 24 is fixed. The bracket 24 is formed with vertically spacedbearings 25 and 26 in which a needle-bar 27 is journaled for endwisereciprocatory movement. At its lower extremity, the needle-bar is fittedwith a needle 28 which is adapted for work penetrating movement througha suitable slot 29 formed in the presser-foot 15. Journaled in thesewing head in bushings such as that shown at 30 is a rotary needle-baractuating shaft 31. A combined crank and counterbalance member 32 faston the shaft 31 is fitted with a link 33 which is, in turn, pivoted on apin 34 projecting from the needle-bar 27. A slide block 35 on the pin 34is arranged to slide in Ways 36 formed in the sewing head so as toprevent the needle-bar from turning.

It will be appreciated that the needle-bar actuating shaft 31 isoperatively connected in timed relationship with the mechanism in thestandard and in the bed for actuating the work-feeding mechanism and thelower stitch forming instrumentalities (not shown) which may be of anyconventional type. The work fabric is thus advanced and the stitches areformed from the right to the left as viewed in Fig. 3.

Movably mounted between the sewing head 12 and the needle-bar carryingbracket 24 isa frame or plate 40 which pivotally embraces the uppermostneedle-bar bracket supporting pin 22. The frame 40 is slotted at 41, asis best illustrated in Figs. 2 and 4, slidingly to accommodate thelowermost bracket supporting pin 23 so that the frame 40is pivotallymounted on the pin 22 and is slidably confined between the sewing headand the needle-bar bracket for oscillatory motion which is limited bythe coacting slot 41 and pin 23. The frame 40 is recessed, as at 42,slidingly to accommodate a shank 43 of a cord-laying finger 44 whichshank 43 is maintained in the recess by means of a recess cover plate 45secured as by screws 46-46 to the frame 40.

The shank 43 of the chord-laying finger is formed with an outturned lip43' which is engaged by one end of a coil spring 47 that is connected atits other end to an eye element48 carried by the frame 40. The spring 47serves to bias the cord-laying finger downwardly and into closeproximity to the presser-foot and into a lowered position limited bycontact of the outturned lip 43 with,

the recess cover plate 45. A pin 49 which projects from the presser bar14 and extends beneath the outturned lip 43' of the cord-laying fingerserves to engage and lift the lip and hence the cord-laying fingerwhenever the presserfoot is lifted. By this construction, thecord-laying finger may be advantageously disposed in close proximity tothe presser-foot and yet not interfere with the presser-foot nor withthe manipulation of work fabrics when the presserfoot is raised.

As best shown in Figs. 3 and 6, the cord-laying finger 44 is preferablyformed to extend about the path of the needle 28 so as to occupy aposition in front of the needle Patented Feb. 25, 1958 3 in the line ofscam formation of the sewing machine. The finger 44 is formed, at apoint in front of the needle, with a plurality of cord-guiding apertures50-50.

The apertures 50- are formed in the finger44 at: a point between'thepath of'reciprocation of the needle and the toesof the presser-footbetween which is secured a wire cord guide'51 that facilitates aproperintroduction of the cords to the cord-guiding apertures 50. Thecordlaying finger 44 is formed with a small extension 52 disposed behindthe apertures 50--50 in the line of seam formation and extending towardthe path of the needle.

Referring to Fig. 1 the frame 40 for the cord-laying finger is pivotallyconnected by a shouldered screw 53 to apitman 54 which embra'ces'at itsother extremity an eccentric 55 which is mounted in the sewing machineframe transversely of the needle-bar actuating shaft 31 and which isdriven in timed relation with the needlebar actuating shaft by means ofa bevel gearconnection 56, 57 therewith. The speed ratio of the gearconnection 56, 57 is two-to-one, so that the frame 40 forthe cordlayingfinger will be oscillated at a frequency one-half that of the needle-barreciprocation. As the cord-laying finger 44 is shifted laterally of theline of seam formation, one or more cords, each of which passes throughthe wire'guide 51 and through a respective one ofthe cord-guidingapertures 50-50 in the thread-'laying-finger, is carried from one sideof the needle to the other at each stitch. The cords, which areindicated at- G in Fig. 8, are thusentwined sinuously between thestitches of sewing thread T and are,- therefore, securel y fastened tothe work fabric. 7

The thread-laying mechanism of this invention is, therefore, arranged ina compact manner within the sewing machine frame and is securelysupported and' guided between the machine frame and the needle-barbracketto provide an efficient self-contained cord-laying. mecha-- nismfor the sewing machine.

Moreover, it will be apparent from the accompanying drawings and fromthe above description that the present invention constitutes anextremely expeditious and practical mode of providing a cord-layingsewing machine by simple modification to a conventional zigzagsewingmachine such as is shown in U. S. Patent No. 1,020,089, dated March 12,1912. This modification lends itself as readily to accomplishment by amechanic in the field as it doesto-the original manufacturer ofthe-machine.- The alterations which are r'equiredin order to complete"the present construction from the' zigzag machine of the above notedpatent include the provision of a swinging thread-laying frame such asframe 40, the installation of the swinging frame in the sewing head ofthe'machine as described above, the provision of means for not only"locking the needle-bar carrying frame from lateral movement but also forguiding the swinging thread-laying frame, and modification of theconventional needle-bar jogging mechanism to the new service ofjoggingthe thread-laying frame.

Having thus set forth we claim herein is:'

1. In a sewing machine adapted to present-one'o'f more the nature of theinvention, what cords to the action of' the usual stitch formingin'str'umentalities, and having" a. ewing head", a needle-bar bracket,means securingsaid bracket to said sewing head, a needle-bar journaledfor endwisereciprocatory motion in said bracket, and means arranged insaid sewing head for actuating said needle-bar, cord-laying. mechanismcomprising a frame interposed between said sewing head and saidneedle-bar bracket, said frame being supported on said needle-barbracket securing means for movement in a direction transversely of theendwise reciprocatory motion of said needle-bar, means driven by saidneedlebar actuating means for reciprocating said frame, and acord-laying finger carried by said frame.

2. A sewing machine adapted to present one or more cords to the actionof the usual stitch-forming instrumentalities, comprising a sewing head,a needle-bar bracket, vertically spaced pins securing said needle-barbracket to said sewing head, a needle-bar journaled for endwisereciprocatory motion in said bracket, means arranged in said sewing headfor actuating said needle-bar, a frame interposed between said sewinghead and said needle-bar bracket, said frame being pivotally mounted onone of said vertically spaced pins, means driven by said needle-baractuating means for oscillating said frame, and a'cord laying-fingercarried by said frame.

3. In a sewingmachine having a sewing head, an endwise reciprocatoryneedle-barcarried in said sewing head, a needle secured in said bar, awork-feeding mechanism determining with said needle a line of seamformation, a presser-bar carried in said sewing head rearwardly of theneedle-carrying bar in the line of scam formation, a cordlayingmechanism comprising a frame pivoted in said sewing-head between saidneedle and said presser-bar, means actuated by said sewing machine foroscillating said frame,and acord-laying finger extending from said frameto a point infront of said needle in the line of seam formation.

4 Acord-laying frame adaptedfor use in the conversion into a cord-layingsewing machine of a zigzag sewing machine of: the type havingavertically'movable presser device, a= needlc-bancarryingbracket which ispivotally supported for movements'transversely of said presser device,and a needle-bar jogging mechanism for said bracket, said framecomprising an elongated rigid support member, me'ansarranged at a'firstextremity of said support member and adapted to embrace the pivotalsupport for said needle-bar carrying bracket, a cord-laying fingerslidably carried in the opposite extremity of said support member formovement toward and away from said first extremity, means carried bysaid cord-laying finger and adapted to effect sliding movements of saidcord-laying finger in responseto vertical movements of said presserdevice, and means carried intermediate the extremities of said supportmember for accommodating an operative connection between the supportmember and the needle-bar jogging mechanism of the sewing machine.

5. The methodof constructing a straightaway stitching machine with acord-laying mechanism which comprises the conversion of a zigzag sewingmachine of the type including a pivotally supported needle-bar carryingbracket 53' pfoviding a frame with a cord-laying guide attached thereto,journaling said frame on the pivotal support for the'ne'edl'e-barcarrying bracket, providing a means in thenatureof a pin for lockingsaid needle-bar carrying bracket against swinging movement, andutilizing. the needle-banjogging mechanism of the sewing machine for.actuating said cord-laying frame.

References Cited in the file of this patent UNITED STATES PATENTS781,673 Mueller Feb. 7, 1905

